1 | /* |
1 | /* |
2 | * libev event processing core, watcher management |
2 | * libev event processing core, watcher management |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
… | |
… | |
591 | if (syserr_cb) |
591 | if (syserr_cb) |
592 | syserr_cb (msg); |
592 | syserr_cb (msg); |
593 | else |
593 | else |
594 | { |
594 | { |
595 | #if EV_AVOID_STDIO |
595 | #if EV_AVOID_STDIO |
596 | const char *err = strerror (errno); |
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597 | |
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598 | ev_printerr (msg); |
596 | ev_printerr (msg); |
599 | ev_printerr (": "); |
597 | ev_printerr (": "); |
600 | ev_printerr (err); |
598 | ev_printerr (strerror (errno)); |
601 | ev_printerr ("\n"); |
599 | ev_printerr ("\n"); |
602 | #else |
600 | #else |
603 | perror (msg); |
601 | perror (msg); |
604 | #endif |
602 | #endif |
605 | abort (); |
603 | abort (); |
… | |
… | |
639 | ptr = alloc (ptr, size); |
637 | ptr = alloc (ptr, size); |
640 | |
638 | |
641 | if (!ptr && size) |
639 | if (!ptr && size) |
642 | { |
640 | { |
643 | #if EV_AVOID_STDIO |
641 | #if EV_AVOID_STDIO |
644 | ev_printerr ("libev: memory allocation failed, aborting.\n"); |
642 | ev_printerr ("(libev) memory allocation failed, aborting.\n"); |
645 | #else |
643 | #else |
646 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
644 | fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size); |
647 | #endif |
645 | #endif |
648 | abort (); |
646 | abort (); |
649 | } |
647 | } |
650 | |
648 | |
651 | return ptr; |
649 | return ptr; |
… | |
… | |
815 | /* by older ones */ |
813 | /* by older ones */ |
816 | EV_TV_SET (tv, delay); |
814 | EV_TV_SET (tv, delay); |
817 | select (0, 0, 0, 0, &tv); |
815 | select (0, 0, 0, 0, &tv); |
818 | #endif |
816 | #endif |
819 | } |
817 | } |
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|
818 | } |
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819 | |
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|
820 | inline_speed int |
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|
821 | ev_timeout_to_ms (ev_tstamp timeout) |
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|
822 | { |
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823 | int ms = timeout * 1000. + .999999; |
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824 | |
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825 | return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1; |
820 | } |
826 | } |
821 | |
827 | |
822 | /*****************************************************************************/ |
828 | /*****************************************************************************/ |
823 | |
829 | |
824 | #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
830 | #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
… | |
… | |
1371 | #endif |
1377 | #endif |
1372 | } |
1378 | } |
1373 | |
1379 | |
1374 | /*****************************************************************************/ |
1380 | /*****************************************************************************/ |
1375 | |
1381 | |
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|
1382 | void |
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|
1383 | ev_feed_signal (int signum) |
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|
1384 | { |
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|
1385 | #if EV_MULTIPLICITY |
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|
1386 | EV_P = signals [signum - 1].loop; |
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1387 | |
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1388 | if (!EV_A) |
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|
1389 | return; |
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|
1390 | #endif |
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|
1391 | |
|
|
1392 | signals [signum - 1].pending = 1; |
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|
1393 | evpipe_write (EV_A_ &sig_pending); |
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|
1394 | } |
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|
1395 | |
1376 | static void |
1396 | static void |
1377 | ev_sighandler (int signum) |
1397 | ev_sighandler (int signum) |
1378 | { |
1398 | { |
1379 | #if EV_MULTIPLICITY |
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|
1380 | EV_P = signals [signum - 1].loop; |
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|
1381 | #endif |
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|
1382 | |
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|
1383 | #ifdef _WIN32 |
1399 | #ifdef _WIN32 |
1384 | signal (signum, ev_sighandler); |
1400 | signal (signum, ev_sighandler); |
1385 | #endif |
1401 | #endif |
1386 | |
1402 | |
1387 | signals [signum - 1].pending = 1; |
1403 | ev_feed_signal (signum); |
1388 | evpipe_write (EV_A_ &sig_pending); |
|
|
1389 | } |
1404 | } |
1390 | |
1405 | |
1391 | void noinline |
1406 | void noinline |
1392 | ev_feed_signal_event (EV_P_ int signum) |
1407 | ev_feed_signal_event (EV_P_ int signum) |
1393 | { |
1408 | { |
… | |
… | |
1645 | static void noinline |
1660 | static void noinline |
1646 | loop_init (EV_P_ unsigned int flags) |
1661 | loop_init (EV_P_ unsigned int flags) |
1647 | { |
1662 | { |
1648 | if (!backend) |
1663 | if (!backend) |
1649 | { |
1664 | { |
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|
1665 | origflags = flags; |
|
|
1666 | |
1650 | #if EV_USE_REALTIME |
1667 | #if EV_USE_REALTIME |
1651 | if (!have_realtime) |
1668 | if (!have_realtime) |
1652 | { |
1669 | { |
1653 | struct timespec ts; |
1670 | struct timespec ts; |
1654 | |
1671 | |
… | |
… | |
1699 | #endif |
1716 | #endif |
1700 | #if EV_USE_SIGNALFD |
1717 | #if EV_USE_SIGNALFD |
1701 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1718 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
1702 | #endif |
1719 | #endif |
1703 | |
1720 | |
1704 | if (!(flags & 0x0000ffffU)) |
1721 | if (!(flags & EVBACKEND_MASK)) |
1705 | flags |= ev_recommended_backends (); |
1722 | flags |= ev_recommended_backends (); |
1706 | |
1723 | |
1707 | #if EV_USE_IOCP |
1724 | #if EV_USE_IOCP |
1708 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1725 | if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); |
1709 | #endif |
1726 | #endif |
… | |
… | |
1735 | /* free up a loop structure */ |
1752 | /* free up a loop structure */ |
1736 | void |
1753 | void |
1737 | ev_loop_destroy (EV_P) |
1754 | ev_loop_destroy (EV_P) |
1738 | { |
1755 | { |
1739 | int i; |
1756 | int i; |
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|
1757 | |
|
|
1758 | #if EV_MULTIPLICITY |
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|
1759 | /* mimic free (0) */ |
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|
1760 | if (!EV_A) |
|
|
1761 | return; |
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|
1762 | #endif |
|
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1763 | |
|
|
1764 | #if EV_CLEANUP_ENABLE |
|
|
1765 | /* queue cleanup watchers (and execute them) */ |
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|
1766 | if (expect_false (cleanupcnt)) |
|
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1767 | { |
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1768 | queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP); |
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1769 | EV_INVOKE_PENDING; |
|
|
1770 | } |
|
|
1771 | #endif |
1740 | |
1772 | |
1741 | #if EV_CHILD_ENABLE |
1773 | #if EV_CHILD_ENABLE |
1742 | if (ev_is_active (&childev)) |
1774 | if (ev_is_active (&childev)) |
1743 | { |
1775 | { |
1744 | ev_ref (EV_A); /* child watcher */ |
1776 | ev_ref (EV_A); /* child watcher */ |
… | |
… | |
1812 | #if EV_PERIODIC_ENABLE |
1844 | #if EV_PERIODIC_ENABLE |
1813 | array_free (periodic, EMPTY); |
1845 | array_free (periodic, EMPTY); |
1814 | #endif |
1846 | #endif |
1815 | #if EV_FORK_ENABLE |
1847 | #if EV_FORK_ENABLE |
1816 | array_free (fork, EMPTY); |
1848 | array_free (fork, EMPTY); |
|
|
1849 | #endif |
|
|
1850 | #if EV_CLEANUP_ENABLE |
|
|
1851 | array_free (cleanup, EMPTY); |
1817 | #endif |
1852 | #endif |
1818 | array_free (prepare, EMPTY); |
1853 | array_free (prepare, EMPTY); |
1819 | array_free (check, EMPTY); |
1854 | array_free (check, EMPTY); |
1820 | #if EV_ASYNC_ENABLE |
1855 | #if EV_ASYNC_ENABLE |
1821 | array_free (async, EMPTY); |
1856 | array_free (async, EMPTY); |
… | |
… | |
1985 | #if EV_FORK_ENABLE |
2020 | #if EV_FORK_ENABLE |
1986 | assert (forkmax >= forkcnt); |
2021 | assert (forkmax >= forkcnt); |
1987 | array_verify (EV_A_ (W *)forks, forkcnt); |
2022 | array_verify (EV_A_ (W *)forks, forkcnt); |
1988 | #endif |
2023 | #endif |
1989 | |
2024 | |
|
|
2025 | #if EV_CLEANUP_ENABLE |
|
|
2026 | assert (cleanupmax >= cleanupcnt); |
|
|
2027 | array_verify (EV_A_ (W *)cleanups, cleanupcnt); |
|
|
2028 | #endif |
|
|
2029 | |
1990 | #if EV_ASYNC_ENABLE |
2030 | #if EV_ASYNC_ENABLE |
1991 | assert (asyncmax >= asynccnt); |
2031 | assert (asyncmax >= asynccnt); |
1992 | array_verify (EV_A_ (W *)asyncs, asynccnt); |
2032 | array_verify (EV_A_ (W *)asyncs, asynccnt); |
1993 | #endif |
2033 | #endif |
1994 | |
2034 | |
… | |
… | |
2078 | |
2118 | |
2079 | for (pri = NUMPRI; pri--; ) |
2119 | for (pri = NUMPRI; pri--; ) |
2080 | while (pendingcnt [pri]) |
2120 | while (pendingcnt [pri]) |
2081 | { |
2121 | { |
2082 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2122 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
2083 | |
|
|
2084 | /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ |
|
|
2085 | /* ^ this is no longer true, as pending_w could be here */ |
|
|
2086 | |
2123 | |
2087 | p->w->pending = 0; |
2124 | p->w->pending = 0; |
2088 | EV_CB_INVOKE (p->w, p->events); |
2125 | EV_CB_INVOKE (p->w, p->events); |
2089 | EV_FREQUENT_CHECK; |
2126 | EV_FREQUENT_CHECK; |
2090 | } |
2127 | } |
… | |
… | |
2858 | sa.sa_handler = ev_sighandler; |
2895 | sa.sa_handler = ev_sighandler; |
2859 | sigfillset (&sa.sa_mask); |
2896 | sigfillset (&sa.sa_mask); |
2860 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2897 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
2861 | sigaction (w->signum, &sa, 0); |
2898 | sigaction (w->signum, &sa, 0); |
2862 | |
2899 | |
|
|
2900 | if (origflags & EVFLAG_NOSIGMASK) |
|
|
2901 | { |
2863 | sigemptyset (&sa.sa_mask); |
2902 | sigemptyset (&sa.sa_mask); |
2864 | sigaddset (&sa.sa_mask, w->signum); |
2903 | sigaddset (&sa.sa_mask, w->signum); |
2865 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
2904 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
|
|
2905 | } |
2866 | #endif |
2906 | #endif |
2867 | } |
2907 | } |
2868 | |
2908 | |
2869 | EV_FREQUENT_CHECK; |
2909 | EV_FREQUENT_CHECK; |
2870 | } |
2910 | } |
… | |
… | |
3562 | |
3602 | |
3563 | EV_FREQUENT_CHECK; |
3603 | EV_FREQUENT_CHECK; |
3564 | } |
3604 | } |
3565 | #endif |
3605 | #endif |
3566 | |
3606 | |
|
|
3607 | #if EV_CLEANUP_ENABLE |
|
|
3608 | void |
|
|
3609 | ev_cleanup_start (EV_P_ ev_cleanup *w) |
|
|
3610 | { |
|
|
3611 | if (expect_false (ev_is_active (w))) |
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|
3612 | return; |
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|
3613 | |
|
|
3614 | EV_FREQUENT_CHECK; |
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|
3615 | |
|
|
3616 | ev_start (EV_A_ (W)w, ++cleanupcnt); |
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|
3617 | array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2); |
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|
3618 | cleanups [cleanupcnt - 1] = w; |
|
|
3619 | |
|
|
3620 | /* cleanup watchers should never keep a refcount on the loop */ |
|
|
3621 | ev_unref (EV_A); |
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|
3622 | EV_FREQUENT_CHECK; |
|
|
3623 | } |
|
|
3624 | |
|
|
3625 | void |
|
|
3626 | ev_cleanup_stop (EV_P_ ev_cleanup *w) |
|
|
3627 | { |
|
|
3628 | clear_pending (EV_A_ (W)w); |
|
|
3629 | if (expect_false (!ev_is_active (w))) |
|
|
3630 | return; |
|
|
3631 | |
|
|
3632 | EV_FREQUENT_CHECK; |
|
|
3633 | ev_ref (EV_A); |
|
|
3634 | |
|
|
3635 | { |
|
|
3636 | int active = ev_active (w); |
|
|
3637 | |
|
|
3638 | cleanups [active - 1] = cleanups [--cleanupcnt]; |
|
|
3639 | ev_active (cleanups [active - 1]) = active; |
|
|
3640 | } |
|
|
3641 | |
|
|
3642 | ev_stop (EV_A_ (W)w); |
|
|
3643 | |
|
|
3644 | EV_FREQUENT_CHECK; |
|
|
3645 | } |
|
|
3646 | #endif |
|
|
3647 | |
3567 | #if EV_ASYNC_ENABLE |
3648 | #if EV_ASYNC_ENABLE |
3568 | void |
3649 | void |
3569 | ev_async_start (EV_P_ ev_async *w) |
3650 | ev_async_start (EV_P_ ev_async *w) |
3570 | { |
3651 | { |
3571 | if (expect_false (ev_is_active (w))) |
3652 | if (expect_false (ev_is_active (w))) |